"Dreams may be more important than sleep. We all need to dream," some scientists say.
Dreams take up about one quarter（四分之一）of our sleeping time. People have several dreams each night. Dreams are like short films. They are usually in color. Some dreams are like old films. They come to us over and over again. That may be because the dreamer is worrying about something. Dreaming may be a way of trying to find an answer.
Some people get new ideas about their work from dreams. They may think about their work all day. These ideas can carry over into dreams.
Too many dreams can be harmful(伤害的).The more we sleep, the longer we dream. The mind is hard at work when we dream. That is why we may have a long sleep but we still wake up tired.
Betty and Lingling are talking about the future. "What will our life 1 in the future?" asks Betty. "I don't know," says Lingling. "What do you think?" "Well, no one knows, but it's interesting 2 ." "We will 3 go to school. We 4 our lessons on the Internet. When we have problems(难题). The teacher will 5 us the answers on the Internet.
"Now almost everyone 6 a mobile phone, but 7 twenty years everyone will carry apocket computer." "A lot of people will live and work under the sea." "Machines will do lots of 8 , and so people will have more 9 ." "We will have some rice, vegetables and fruit for meals every day. We will not get any meat to eat because there will be 10 animals."
"Oh, our way of life in the future will change a lot."
